phpseclib\Net\SSH1::_append_log PHP Method

    function _append_log($protocol_flags, $message)
    {
        switch (NET_SSH1_LOGGING) {
            // useful for benchmarks
            case self::LOG_SIMPLE:
                $this->protocol_flags_log[] = $protocol_flags;
                break;
                // the most useful log for SSH1
            // the most useful log for SSH1
            case self::LOG_COMPLEX:
                $this->protocol_flags_log[] = $protocol_flags;
                Strings::shift($message);
                $this->log_size += strlen($message);
                $this->message_log[] = $message;
                while ($this->log_size > self::LOG_MAX_SIZE) {
                    $this->log_size -= strlen(array_shift($this->message_log));
                    array_shift($this->protocol_flags_log);
                }
                break;
                // dump the output out realtime; packets may be interspersed with non packets,
                // passwords won't be filtered out and select other packets may not be correctly
                // identified
            // dump the output out realtime; packets may be interspersed with non packets,
            // passwords won't be filtered out and select other packets may not be correctly
            // identified
            case self::LOG_REALTIME:
                echo "<pre>\r\n" . $this->_format_log(array($message), array($protocol_flags)) . "\r\n</pre>\r\n";
                @flush();
                @ob_flush();
                break;
                // basically the same thing as self::LOG_REALTIME with the caveat that self::LOG_REALTIME_FILE
                // needs to be defined and that the resultant log file will be capped out at self::LOG_MAX_SIZE.
                // the earliest part of the log file is denoted by the first <<< START >>> and is not going to necessarily
                // at the beginning of the file
            // basically the same thing as self::LOG_REALTIME with the caveat that self::LOG_REALTIME_FILE
            // needs to be defined and that the resultant log file will be capped out at self::LOG_MAX_SIZE.
            // the earliest part of the log file is denoted by the first <<< START >>> and is not going to necessarily
            // at the beginning of the file
            case self::LOG_REALTIME_FILE:
                if (!isset($this->realtime_log_file)) {
                    // PHP doesn't seem to like using constants in fopen()
                    $filename = self::LOG_REALTIME_FILE;
                    $fp = fopen($filename, 'w');
                    $this->realtime_log_file = $fp;
                }
                if (!is_resource($this->realtime_log_file)) {
                    break;
                }
                $entry = $this->_format_log(array($message), array($protocol_flags));
                if ($this->realtime_log_wrap) {
                    $temp = "<<< START >>>\r\n";
                    $entry .= $temp;
                    fseek($this->realtime_log_file, ftell($this->realtime_log_file) - strlen($temp));
                }
                $this->realtime_log_size += strlen($entry);
                if ($this->realtime_log_size > self::LOG_MAX_SIZE) {
                    fseek($this->realtime_log_file, 0);
                    $this->realtime_log_size = strlen($entry);
                    $this->realtime_log_wrap = true;
                }
                fputs($this->realtime_log_file, $entry);
        }
    }